Latch mechanism



F. JARZYNA.

LATCH MECHANISM. APPLICATION FILED SEPT. 4. 1920,

3 SHEETS-SHEET I.

'2 H M-am Patented Feb. 15, 1921.

F. JARZYNA. LATCH MECHANISM. APPLICATION HLED\SEPT.4, I920- Patented Feb. 15, 1921.

3 SHEETS-SHEET 2- parts being in top plan.

STATES FRANK JARZYNA, 015' DETROIT, MICHIGAN.

To all whom it may 'ooncern:

Be it known that I, FRANK JARZYNA, a citizen of Poland, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Latch Mechanisms, of which the following is a specification, reference beinghad to the accompanying drawings.

This invention relates to certain improvements in latch mechanisms, and it is an object of the invention to provide a mechanism of this general character embodying a novel and improved means for operating the latch bolt and wherein said means is normally inoperative.

Another object of the invention is to provide a novel and improved mechanism of this general character embodyin a normally extended latch bolt, toget er with means for retracting said bolt, said means being of a construction whereby the operation thereof by an unauthorized person is prevented.

An additional object of the invention is to provide a novel and improved device of this general character embodying a latch bolt and a rotatable operating member therefor, together with means for rotating said operating member when it is desired to retract the latch bolt.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my im proved latch mechanism whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantaeous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

Figure 1 is a view partly in section and partly in elevation of a latch mechanism constructed in accordance with an embodiment of my invention. 7

Fig. 2 is a transverse view taken through the upper portion of Fig. 1, certain of the Fig. 3 is a view similar to Fig. 1, with certain of the parts in a second position and showing the latch bolt r tr ct Specification of Letters Patent.

Patented Feb. 15, 1921.

Application filed September 4 1920. Serial No. 408,226.

Fig 4.isa fragmentary view partly in elevation and partly in section of the structure shown in the lower portion of Fig. 3 and illustrating certain details of construction.

Fig. 5 is a view similar to Fig. 1 but showlng certain of the parts in a third position.

Flg. 6 is a view in elevation of the rotary operating member, the teeth at the oppopite sides thereof being indicated by dotted mes.

Fig. 7 is a fragmentary view partly in elevation and partly in section of the members for moving the rotatable operating member, and

Fig. 8- is a view in swinging member latch bolt.

As disclosed in the accompanying drawings C denotes a casing ofa type generally employed in connection with a mortise lock. although I do not wish to be understood as limiting myself in this respect as the casing C may be of any construction or configuration which will best comply with the requirements of practice.

Reciprocating through the front face 1 of the casing C in a well known manner is the beveled end portion or head 2 of the latch bolt L. The inner or inserted end portion of the latch bolt L has slidable contact with an upstanding lug 3 carried by the bottom flange a of the casing C. Underlying the latch" bolt L and interposed between the lug 3 and the beveled end portion or head 2 of the latch bolt is the expansible member 5 herein disclosed as a coil spring and which operates automatically to impart outward movement to thelatch bolt L, and to maintain said bolt extended.

The outward movement of the latch bolt front elevation of the L is limited by the verticallydisposed flange 6 carried by the lower and forward portion of a side plate 7 of the casing C and which flange coacts with an upstanding lug 8 can ried by the latch bolt L at a point suitably spaced from the beveled portion or head 2 of the latch L. The intermediate portion a of the flange 6 is offset for a purpose to be hereinafter more particularly referred to.

Carried by the plate 7 of the casing C and extending inwardly thereof is a pin 9 which serves as a shaft or axle for the rotatable operating member R circular in form and of requisite dimensions. The member R has directly coacting with the extending outwardly from the periphery thereof and in relatively close relation the reversely directed teeth and 11.

Carried by the opposite side faces of the member R are theratchet wheels 12 concentric to the axial center of the member R but 'each than the diameter of said member. The spaces between certain adjacent teeth of the ratchet wheels 12, as b, are shallower than the spaces between the remaining adjacent pairs of teeth, the deeper spaces 0 coacting with the shallower spaces Z) in order to determine a particular manner of operation for imparting the requisite inward or retracting movement to the latch member L as will be hereinafter more particularly referred to.

Theplate 7 at its lower and inner portion is provided with an inwardly directed pin 14 with which is pivotally engaged the upstanding arms 15, each of which has coacting therewitha spring 16 constantly urging the same in a direction away from the member R. j

-The upper end portion of each of the arms is bifurcated and fitting within the kerf 17 of each ofsaid arms is the tail a dog 19, the free end portion of a side face of the member R and movablethereover upon rocking movement of the coacting arm 15. 'The tail portion 18 of each of the dogs 19 is-provided with an outstanding trunnion or stud 20 which extends throughjthe adjacent portion of the arm 15 whereby the dog 19 is pivotally engaged with the arm 15 to permit said dog to have swinging movement.

The outer end portion of the trunnion or stud 20 is provided with a head 21 herein disclosed as semicircular in form and bearing against the straight edge of said head 21 is the free end portion or" a fiat spring 22.

The opposite end portion of the spring 22 is suitably secured, as at 23, to the lower or pivoted end portion of the adjacent arm 15. The spring 22 operates to normally mainv tain the dog 19 at the limit of its movement her to which it is applied and it inwardly of the arm 15 or in a direction toward the member R yet at the same time permits said dog to have outward swinging movement.

Rotatably supported within the casing C rearwardly of the arms 15- is a bushing 24, the bore of which is angular and through which is disposed the spindle-S. The spindle S, in practice, extends beyond opposite sides of the casing C and the work or memis adapted to be rotated or rocked in a well known manner and preferably through the instrumentality of knobs secured to the opposite end portions.

The bushing 24 is provided with the ophaving a major diameter less;

at 30, so that V spect to positely directed fingers 25 and 26,said finvided with an inwardlydirected stud or pin 27 which extends within thelongitudinally directed slot 28 provided in the upper end portionof an arm ;29 whereby said arm is capable both of-swmging or rocking movement and endwise movement. The central portion of the arm 29 has a face cut away, as the same ay readily extend over the member R without interfering with the operation of said member Rlor the arm 29. i V

Bearing against the upper portion of the arm 29 is a spring 31 which operates to force or swing the arm 29 in a direction away from thearms 15 and 'alsoto. bind said arm 29. against theipin or-stud 27 whereby the arm 29'is frictionally held in its different positions longitudinally of the'slot 28.

The lower endiportion of the arm 29 has one side portion cut away to provide a notch 32 to receive the upper'or free end portion or" the lug 8 whereby, in a manner to be hereinafter more particularly referred to, the

arm 29 is caused to retract or. move the latch bolt L inwardly. The lower end wall 33 'ofthe'cut-a-way portion is beveled downwardly and arms l5 while the upper end wall 34 of said cut-away portion30 isIsubstan'tially at right angles to the longitudinal axisof the arm 29. Each of the dogs 19 is provided at the upper part of its forward orfree end with an extension or tongue 35which, when said dog 19 engages withina shallow space I) of a ratchet 12, contacts with the end wall 34 as the coacting arm 15' is rocked or moved inwardly and thereby moves or'raises-the arm 29 to an inoperative position with rethe lug 8 and as illustrated in Fig.6. n

Coacting' with one of the ratchet wheels 12 is a holding pawl 36, said pawl being constantly urged toward said ratchet wheel through the. instrumentality of the spring 37. As isbelieved to be pawl36 serves, to hold the rotary'member R against retrograde movement. movement of the'pawl 36 under the influence of the spring 37 is limited by the stop 38 which comprises apin or stud extendin inwardly from. the plate 7 of the casingC in a direction toward the The self-evident, the

with or partially overlies the upper .43. The dog 43 is constantly urged toward the block 41 by a spring 44. The dog 43 operates to maintain the member or slide M in difierent positions and also to hold the same in frictional contact with the flange 39.

The block 41 has disposed transversely therethrough an opening 45 in register with a slot 46 produced in the plate 7 and also in the removable side plate 47. A suitable implement of any desired character is engaged within the opening 45 of the block 41 from from either side of the casing C, whereby the member or slide M may be moved longitudinally as desired and the position of the member or slide M within the casing may be determined by the clicking of the dog 43 when engaging within a notch 42.

In the present embodiment of my invention, the slide or member M is in operative position when the dog 43 is engaged with the intermediate notch 42 and when so positioned the end portion of the member or slide M remote from the block 41 is provided with an inwardly directed flange or lip 48 which alines with the inner end portion of the latch bolt L for a purpose which will be hereinafter more particularly referred to. The member or slide M is also provided with the inwardly directed and transversely disposed ribs 49 which, when the slide or member M is in the position just referred to, are adapted to be engaged by the fingers 25 and 26 so that the extent of swinging movement of the arms 15 through the medium of the fingers 25 and 26 is limited in accordance with the requirements of practice.

The operation of my improved latch mechanism is dependent upon the knowledge of the exact or particular location or arrangement of the shallow spaces 7) between adjacent teeth of the ratchet wheels 12 and when it is desired to retract the latch bolt L, the spindle S is rocked in such directions to cause the dogs 19 to engage only within the spaces 0 although it is to be understood that the member R will be intermittently rotated by contact of a dog 19 with one of the teeth of either of the ratchet wheels. r

Normally the arm 29 is in engagement portion of the lug 8, and is forced downwardly into such position by contact of the tooth 11 with the end wall 33. When it is desired to retract the latch bolt L in order to effect .an

opening movement of a door or other member to which the mechanism may be applied, the arms 15 are rocked until the tooth 10 engages the adjacent end portion of the arm 29, it being understood at this time that the member M is either in the lowered position as indicated in Fig, 4 or in a raised position. Upon a further rotation of the member R as effected by a single tooth, the beveled edge 33 of the arm 29 engages the cam face 50 of the inwardly directed stud or pin 51 carried by the'pla-te 7 causing the arm 29 to move downwardly a distance suiiicient to permit the tooth 10 to pass beyond said arm 29. At this time, the spring 31 will throw the arm 29 back to the limit of its movement, as illustrated in Fig. 5, and at the same time the spring 5 will force the latch bolt L outwardly into its normal or extended position. While it is true that during this operation the latch bolt L will be retracted, the movements of the bolt will be so quick that an opening operation will be impossible. -When the tooth 10 passes free of the arm 29, a click or audible signal will indicate this operation, whereupon a person authorized to operate the latch mechanism will adjust or move the member M to bring the flange or lip 48- carried by said member into alinement with the latch bolt L, as indicated in Figs. 1, 2 and 3.

The spindle S is then turned once to the right, then once to the left, then once to the right, then twice to the left, then once to the right and once to the left. At this time the lug 8 will extend within the notch 32 so that as the' spindle is rocked, the latch bolt L will be retracted as desired, and the requisite coaction will be maintained between the arm 29 and the lug 8 due to the fact that the-flange or lip 48 serves to limit the inward movement of the latch bolt L so that the tooth 10 will not pass beyond the arm 29. When the member It is rotated to initially position the same for authorized operation by the spindle S and after the notifying click or si 'nal has been produced, the

tooth 11 will engage the high end of the wall and serve as a cam to force the arm 29 downwardly into the position illustrated in Fig. 1, so that upon the proper intermittent rotation of the member R, the arm 29 will properly coact-with the lug 8 to retract the latch bolt L.

When it is desired to adjust the parts of the mechanism to prevent unauthorized opening or retracting of the latch bolt L, the member M is either moved upwardly or downwardly into a second position and a turn given to the spindle S, whereupon the latch bolt L will have further movement under the influence of the arm 29' and to an extent suiiicient to permit the tooth 10 to pass by the arm 29 and which action is further permitted in. view of the fact that when the member 1% is in an inoperative position,

. urging the same outwardly,

' portedboth for rocking movement and enclbination, a latch bolt, means for 7 shown in carrying out my invention the fingers 25 and 26 are capable of a greater extent of travel due to the fact that the same will not contact with the ribs 49.

When the removable plate a7 is in applied position, an inwardly disposed lug 52 carried thereby engages one of the dogs 19 to hold the same in a substantially fixed path of 7 travel.

Thesecond dog 19 is maintained in substantially a fixed path of travel in view ofthe fact that said second dog 19 is nor mally extended between the peripheral'portion of the member R and the side plate 7.

From the foregoing description it is thought to be obvious that a latch mecha nism constructed in accordance with my in vention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and oper ated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason'I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein in practice except as hereinafter claimed.

I claim: y

1. A latch mechanism comprising, in combination, a latch bolt, means for constantly an arm supwise movement, said arm' when moved endwise in one direction engaging the latch bolt to cause said latch bolt and rock arm to move in unison, a spindle, and means coacting with the spindle and the rock arm for imparting rocking movement in one direction to the rock arm.

2. "A latch mechanism comprising, in com constantly urging the same outwardly, an arm supported both for rocking movement and endwise movement, said arm when moved endwise in one direction engaging the latch bolt to cause said latch bolt and rock arm to move in unison, a spindle, and means coacting with the spindle and the rock arm for imparting rocking movement in one direction to the rock arm, said means also operating intermittently to move the rock arm in a direction away from the latch bolt and out'of engagement therewith. i

3. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, an arm supported both for rocking movement and endwise movement, said arm when moved endwise in onedirection engaging the latch bolt .to cause said latch bolt and rock arm to-move in unison, a spindle, means coacting with the spindle and the rock arm for imparting rocking movement in one direction to the rock arm, and means for constantly urging therock arm in the opposite direction.

7 .4. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, a rock arm movable toward or fromthe latch bolt and contacting with saidlatch bolt when moved in one direction, a rotatable member, and

means for intermittently rotating said memher, said rotatable member having a part contacting with the arm for imparting rocking"movement'thereto when said rock arm is in a position'to contact with the latch bolt.

5. A latch mechanism comprising,in combination, a latch bolt means for constantly urging the same outwardly, a rock arm movable toward. or from the latch bolt and contacting with said latch bolt when moved'i'n onedirection, a rotatable member, means for intermittently rotating said member; said rotatable memberhaving a part contacting with thezarm' for imparting rocking movement thereto when said rock, arm is in a position to contact with the "latch, bolt, and means coasting with the roclr arm for moving the same/out of contact with the part carried by the rotatable member.

6. A- latch mechanism comprising, in combination, a latch bolt, means for-constantly ur ing the sameoutwardly, a rotatable member, means for intermittently rotating said member, a rock'armhaving endwise move ment toward or from the latch bolt, and a part carried by the rotatable member to engage the arm to impart rocking movement thereto when said rock arm-is in a position to engage the latch bolt, the means for intermittently rotating said member also operating intermittently to move the rock arm into a position out of contact with the latch bolt.

7. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, a rotatable member, means for intermittently rotating said member, a rock arm having endwise move ment toward or from the latch bolt, and a part carried by the rotatable member to engage the arm to impart rocking 'movement thereto when said rock arm is in a position to engage the latch bolt, the means for intermittently rotating said member also operating intermittently to move the rockarm into a position out. of contact with the latch bolt, said rotatable member being also provided with a part for imparting endwise movement to the rock arm when out of contact with the latch bolt into a position to engage the latch bolt.

8. A latch mechanism'comprising, in comconstantly member provided with a ratchet and having a part for contact with the rock arm to impart rocking movement thereto in one direction, means for constantly urging the rock arm in the opposite direction, a second rock arm, means for imparting movement thereto, and a dog carried by said second rock arm and engaging the ratchet of said rotatable member, whereby said rotatable member is intermittently rotated.

9. A latch mechanism comprising, in combination, a latch-bolt, means for constantly urging the same outwardly, a rock arm supported for endwise movement toward or from the latch bolt, said rock arm engaging the latch bolt when in one position, a rotatable member provided with a ratchet and having a part for contact with the rock arm to impart rocking movement thereto in one direction, means for constantly urging the rock rm in the opposite direction, a second rock arm, means for imparting movement thereto, and a dog carried by said second rock arm and engaging the ratchet of said rotatable member, whereby said rotatable member is intermittently rotated, sai ratchet and first named rock arm being provided with coacting means whereby the dog intermittently causes the first named rock arm to move endwise into a position out of contact with the latch bolt.

a 10. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, a rock arm sup ported for v endwise movement toward or from the latch bolt, said rock arm engaging the latch bolt when in one position, a rotatable member provided with a ratchet and having a part for contact with the rock arm to impart rocking movement thereto in one direction, means for constantly urging the rock arm in the opposite direction, a second rock arm, means for imparting movement thereto, a dog carried by said second rock arm and engaging the ratchet of said rotatable member, whereby said rotatable member is intermittently rotated, the means for intermittently rocking the second named.

rockarm comprising a spindle, and a finger carried by the spindle for contact with the second named rock arm upon rotation of the spindle in one direction.

11. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, a shiftable member operating when in one position to shorten the extent or" retracting movement of the latch bolt, a rock arm contacting with the latchbolt for imparting retracting movement thereto when the rock arm is swung in one direction, a rotatable element provided with a part engaging the rock arm for imparting movement thereto in a direction to retract the latch bolt, and means for rotating the rotatable member, said means intermittently moving the rock arm into a position out of contact with the latch bolt.

12. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, a rock arm having endwise movement and contac ing with the latch bolt when moved endwise in one direction, means for constantly imposing rocking movement to the rock arm in one direction, a rotatable member provided with a part engaging the rock arm when said rock arm is in a position to contact with the latch bolt for imparting rocking movement to the rock arm in an opposite direction and in a direction to retract the latch bolt, ratchets arranged at the opposite sides of the rotating member and movable therewith, a pair of rock arms, a dog carried by each of the second name-d rock arms and engageable with a ratchet at one side of the rotatable member, a spindle, and reversely directed fingers carried by said spindle, each of said fingers having contact with one of the second named rock 13. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, a rock arm having endwise movement and contacting with the latch bolt when moved endwise in one direction, means for constantly imposing rocking movement to the rock arm in one direction, a rotatable member provided with a part engaging the rock arm when said rock arm is in position to contact with the latch bolt for imparting rocking movement to the rock arm in an oppo site direction and in a direction to retract the latch bolt, ratchets arranged at the opposite sides of the rotating member and movable therewith, a pair of rock arms, a

dog carried by each of the second named rock arms and engageable with a ratchet at one side of the rotatable member, a spin dle, reversely directed fingers carried by said spindle, each of said fingers having contact with one of the second named rock arms, and means for constantly urging each of the rock arms toward its coacting finger.

14:. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, a rock arm having endwise movement and contacting with the latch bolt when moved endwise in one direction, means for constantly imposing rocking movement to the rocl: arm in one direction, a rotatable member provided with a part engaging the rock arm when said rock arm is in a position to contact with the latch bolt for imparting rocking movement to the rock arm in an opposite direction and in a direction to retract the latch bolt, ratchets arranged at the opposite sides of the rotating member and movable therewith, a pair of rock arms, a

dog carried by each of the second namedj rock arms andengageable with a ratchet at one side of the rotatable member, a spin dle, reversely directed fingers carried by said spindle, each of said fingers having contact with one of the second named rock arms, and means for contacting with each of the dogs for urging the same toward its coacting ratchet. 1 V v 15. A latch mechanism comprising, in combination, a latch bolt, means for constantly urging the same outwardly, a rock arm having endwise movement and contacting with the latch bolt when'moved endwise in one direction, means for constantly imposing rocking movement to the rock arm in one direction, a rotatable member provided with a part engaging the rock arm when said rock arm is in a position to con tact with the latch bolt for imparting-rocking movement to the rock arm in an opposite direction and in a direction to retract the latch bolt, ratchets arranged at the opposite sides of the rotating member and movable therewith, a pair-of rockarms, a dog carried by each of the second named rock arms and engageable with a ratchet at one side of the rotatable membera spindle, and reverse-1y directed fingers carried by said spindle, each of said 'fingers'having contact with one of the second named rock arms, the space between certain adjacent pairs of teeth of the ratchets being of a depth less than the space between'theremaining adjacent pairs, whereby a dog when engaged within the first named spaces engages the first named rock arm to impart endwise movementthereto in a direction away from the latch bolt. 7

In testimony whereof hereunto affix signature.

FRANK A -ZYNA. 

